21300102013 has 6 divisors (see below), whose sum is σ = 21330690234. Its totient is φ = 21269557584.

The previous prime is 21300101983. The next prime is 21300102017. The reversal of 21300102013 is 31020100312.

It can be written as a sum of positive squares in 3 ways, for example, as 1752427044 + 19547674969 = 41862^2 + 139813^2 .

It is a de Polignac number, because none of the positive numbers 2^k-21300102013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21300101984 and 21300102002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21300102017) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 481495 + ... + 523867.

It is an arithmetic number, because the mean of its divisors is an integer number (3555115039).

Almost surely, 2^21300102013 is an apocalyptic number.

It is an amenable number.

21300102013 is a deficient number, since it is larger than the sum of its proper divisors (30588221).

21300102013 is an frugal number, since it uses more digits than its factorization.

21300102013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43791 (or 43082 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 21300102013 its reverse (31020100312), we get a palindrome (52320202325).

The spelling of 21300102013 in words is "twenty-one billion, three hundred million, one hundred two thousand, thirteen".